BIOL10001 Lecture 22: BIOL10001 Lecture 22 Notes
20 Sep 2018
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Many are small terrestrial animals with few being large, some are also tree dwellers. Some are marine animals, with modi ed front limbs for swimming. According to the fossil record, mammals appear to have originated from mammal like reptiles. Australia is the only continent with all three groups of mammals. Mainly in australia, also in north and south america. Polyprotodont more than one pair of incisors usually carnivorous quoll, tasmanian devil. Usually a pouch (marsupium) for concealment/to carry of the young. Can be diurnal or nocturnal terrestrial or arboreal (living in trees) gliders or diggers. Viviparous mammals (chorioallantoic placenta) penis is not bifurcated single vaginal canal. In australia, marsupials the predominant mammalian fauna single fused or bicornuate uterus (two extensions - cornua) Australia is the only continent where all three subclasses of the mammalia are represented. Introduced mammals, including humans, have had a profound impact on australian ecosystems and have led to the extinction of many native species.
